State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China; Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
Int J Biol Macromol. 2021 Dec 15;193(Pt B):2221-2231. doi: 10.1016/j.ijbiomac.2021.11.054. Epub 2021 Nov 13.
Developing recyclable and efficient adsorbents for cationic dyes removal from wastewater is crucial for ensuring green ecology and drinking water safety. Herein, we demonstrated a novel magnetic gel bead adsorbent that was synthesized by employing graphene oxide (GO) modified FeO as magnetic nanoparticles doped sodium alginate (SA)/chitosan (CS) gel (SA/GO@FeO/CS). The GO@FeO sample was prepared based on GO by the chemical co-precipitation method, which not only reduced the aggregation of FeO but also increases the specific surface area of the composite gel beads. The prepared gel beads were used to adsorb methylene blue (MB), neutral red (NR), and safranine T (ST). The experimental results showed that the adsorption capacity of SA/GO@FeO/CS gel beads for MB, NR, and ST reached 21.325 mg/g, 44.654 mg/g and 44.313 mg/g. After five recycles, the removal rates could still reach more than 90% of the original, exhibiting a high recovery rate. Therefore, this paper provides a strategy for the preparation of high efficiency and recyclable cationic dye adsorbents with a large specific surface area.
开发可回收且高效的吸附剂以去除废水中的阳离子染料对于确保绿色生态和饮用水安全至关重要。在此，我们展示了一种新型磁性凝胶珠吸附剂，它是通过使用氧化石墨烯（GO）修饰的 FeO 作为磁性纳米粒子掺杂海藻酸钠（SA）/壳聚糖（CS）凝胶（SA/GO@FeO/CS）合成的。GO@FeO 样品是基于 GO 通过化学共沉淀法制备的，该方法不仅减少了 FeO 的聚集，而且增加了复合凝胶珠的比表面积。所制备的凝胶珠用于吸附亚甲基蓝（MB）、中性红（NR）和藏红 T（ST）。实验结果表明，SA/GO@FeO/CS 凝胶珠对 MB、NR 和 ST 的吸附容量分别达到 21.325、44.654 和 44.313 mg/g。经过五次循环后，去除率仍可达到原始去除率的 90%以上，表现出较高的回收率。因此，本文为制备具有大比表面积的高效且可回收的阳离子染料吸附剂提供了一种策略。
